Ahora te recuerdo también tu post
3807 y lo que ahí dijiste:
"No me creo que el AVS de un Hans Christian sea de en 48 pies de 110. Solo hay que ver la alzada del barco y ver que es un quilla corrida con unos excelentes Old ratios. El HC, es uno de los mejores barcos juntos con un Collin Archer que uno se pueda comprar, y no me creo que tenga un STIX tan bajo, directamente
Si eso es asi, el STIX no valdria una M..... y este hilo deberia de cerrarse porque seria entonces una tomadura de pelo. Asi de claro lo digo"
Aquí va el texto del último correo que le envié al astillero y a su representante legal en Europa:
Dear Rick,
I have just recived the information on the HC 48T you sent to me, thanks a lot.
I am amazed to learn the STIX is as low as 32,5 for a 48 footer as nice and seaworthy as the HC 48T looks like. Almost in the limit to qualify in Category A under the RCD.
The reason for such a low figure is due to the FDS factor (Factor of Dynamic Stability), which is very low (only 0,53), as the other STIX's factors are good enough.
It seems to me the stability curve has a low positive area, with the maximum GZ being under 0,5 m, and the downflooding angle considered (86º) is also surprisingly low. Also the maximum GZ happens at aropund 40º, which is a low figure when compared with the ususal 50º to 70º range most boats are within, as well as the 114,5º AVS is also considered low for an oceanic globetrotter, even if complying with the minimum 100º required by the ISO 12217.
I imagine all this is probably due to the relatively low freeboard of this classic design when compared with modern trends.
All this makes the boat unsafe? Certainly not, but anyway it would have been desirable to have a better (higher) figure for the STIX. As the freeboard is not possible to be increased, perhaps it woud be possible to increase the downflooding angle, presently too low to my taste. It has been taken as the angle to the main acces hatch but, has it been taken to one of its low corners or to one of the top corners? This is important as when heeling the boat it is usually the upwards corner the one through wich the flooding begins,as usually it is the corner in the lowest position when the boat is inverted, thus significantly increasing the downflooding angle to be considered for the calculations (the area under the GZ curve to the Dfl increases correspondingly, thus increasing FDS).
Most probably all this has already been considered by the calculating person and the downflooding angle is so low because when heeled over the side the very high displacement of the boat makes the "draught" in that position to be very deep and so the lower corner becomes the relevant one to be considered.
Kindest regards.
Guillermo.
Qué, ¿Cerramos el hilo?
